A gender identity disorder is one in which a person wants to be the opposite sex. The person may also believes that he or she is "trapped" in a body of the wrong sex.
Gender identity disorder is a profound disturbance of a person's sense of sexual identity. This disorder can begin as early as 2 years of age.
Gender identity disorder occurs more often in males than in females. No one knows what causes this disorder. Some theories suggest the disorder may be caused by: